Comet Theta
From Jenny Everywhere Wiki
In one world, Comet Theta was a sentient, talking comet.
Jenny Everywhere once made a date with Theta in outer space. Theta was late to the date and only spent a few seconds with Jenny after arriving, before simply continuing to revolve at a high speed in Theta's normal orbit, leaving Jenny behind with a “Bye!”. (COMIC: A Match Made in the Heavens)